function s1_goto_dir(){
cd"$1"
}
function s2_touch_empty_file_with_given_name(){
touch "$1"
}
function s3_make_directories(){
makdir -p project/{git,backup}
}
function s4_create_6_files(){
touch linux1_centos
touch linux1_redhat
touch linux1_c_programming
touch linux2_centos
touch linux2_redhat
touch linux2_c_programming
}
function s5_make_directories_in_git(){
mkdir -p projects/git/linux{1,2}
}
function s6_move_files_to_dir_1_or_2(){
mv projects/*linux1* projects/git/lunx1/
mv projects/*linux2* projects/git/linux2/
}
function s7_create_package_and_compress(){
tar -czvf backup/git.tar.gz git
}
function s8_delete_dir_git(){
rm -r git
}
function s9_recover_from_git_tar_gz_backup(){
tar -zxvf backup/git.tar.gz
}
function s10_create_package_and_compress(){
tar -jcvf backup/git.tar.bz2 git
}
function s11_find_and_sort_alphabetically_all_created_files_and_dirs(){
find . -name 'projects*'| sort
}
function s12_get_next_15_minutes_boundary(){
data -d "+15 menutes" +%Y-%m-%d_%H:%M:%S
}

